StructLayoutAttribute::CharSet Field
Indicates whether string data fields within the class should be marshaled as LPWSTR or LPSTR by default.
Assembly: mscorlib (in mscorlib.dll)
If the CharSet field is set to CharSet::Unicode, all string arguments are converted to Unicode characters (LPWSTR) before they are passed to the unmanaged implementation. If the field is set to CharSet::Ansi, the strings are converted to ANSI strings (LPSTR). If the CharSet field is set to CharSet::Auto, the conversion is platform-dependent (ANSI on Windows 98 and Windows Me, and Unicode on later versions).
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1